參數(shù)資料
型號(hào): STPCE1DDBC
英文描述: Microprocessor
中文描述: 微處理器
文件頁數(shù): 8/87頁
文件大?。?/td> 1356K
代理商: STPCE1DDBC
GENERAL DESCRIPTION
8/87
Release 1.3 - January 29, 2002
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
1.4. CLOCK TREE
The STPC Elite integrates many features and
generates all its clocks from a single 14MHz
oscillator. This results in multiple clock domains as
described in
Figure 1-2
.
The speed of the PLLs is either fixed (DEVCLK),
either programmable by strap option (HCLK)
either programmable by software (GPCLK,
MCLK). When in synchronized mode, MCLK
speed is fixed to HCLKO speed and HCLKI is
generated from MCLKI.
Figure 1-2. STPC Elite clock architecture
IPC
SDRAM controller
North Bridge
14.31818 MHz
XTALO
XTALI
OSC14M
(14MHz)
ISACLK
1/4
GPCLK
PLL
GPCLK
1/2
HCLK
PLL
PCICLKI
PCICLKO
South Bridge
1/2
1/3
HCLK
MCLK
PLL
MCLKI
MCLKO
CPU
x1
x2
Local Bus
Host
ISA
HCLKI
HCLKO
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